package com.chenzhe.apijieshou.util.httputil;

import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.ByteArrayEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;

public class HttpUtil {
    public RequestConfig requestConfig = RequestConfig.custom()
            .setSocketTimeout(15000)
            .setConnectTimeout(15000)
            .setConnectionRequestTimeout(15000)
            .build();
    public static HttpUtil instance = null;
    public HttpUtil(){}
    public static HttpUtil getInstance(){
        if (instance == null) {
            instance = new HttpUtil();
        }
        return instance;
    }
    /**
     * 发送 post请求
     * @param httpUrl 地址
     */
    public String sendHttpPost(String httpUrl) {
        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        return sendHttpPost(httpPost);
    }

    /**
     * 发送 post请求
     * @param httpUrl 地址
     * @param params 参数(格式:key1=value1&key2=value2)
     */
    public String sendHttpPost(String httpUrl, byte[] params) {

        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        try {
            //设置参数
           //  StringEntity stringEntity = new StringEntity(String.valueOf(params), "UTF-8");
            //HttpEntity byteEntity =  new HttpEntity(params);
            ByteArrayEntity arrayEntity = new ByteArrayEntity(params);

            httpPost.setEntity(arrayEntity);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }

    /**
     * 发送 post请求
     * @param httpUrl 地址
     * @param params 参数(格式:key1=value1&key2=value2)
     */
    public String sendHttpPost(Map<String,String> maps, byte[] params) {
            String httpUrl = "http://localhost:9090/api?";
            StringBuffer stringBuffer = new StringBuffer(httpUrl);
        String url = getUrl(maps);
        stringBuffer.append(url);
        HttpPost httpPost = new HttpPost(stringBuffer.toString());// 创建httpPost
        try {
            //设置参数
            //  StringEntity stringEntity = new StringEntity(String.valueOf(params), "UTF-8");
            //HttpEntity byteEntity =  new HttpEntity(params);
            ByteArrayEntity arrayEntity = new ByteArrayEntity(params);

            httpPost.setEntity(arrayEntity);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }
    /**
     * 发送 post请求
     * @param httpUrl 地址
     * @param maps 参数
     */
    public String sendHttpPost(String httpUrl, Map<String,String> maps) {
        HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost
        // 创建参数队列
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
        for (String key : maps.keySet()) {
            nameValuePairs.add(new BasicNameValuePair(key, maps.get(key)));
        }
        try {
            httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));
        } catch (Exception e) {
            e.printStackTrace();
        }
        return sendHttpPost(httpPost);
    }
    /**
     * 发送Post请求
     * @param httpPost
     * @return
     */
    private String sendHttpPost(HttpPost httpPost) {
        CloseableHttpClient httpClient = null;
        CloseableHttpResponse response = null;
        HttpEntity entity = null;
        String responseContent = null;
        try {
            // 创建默认的httpClient实例.
            httpClient = HttpClients.createDefault();
            httpPost.setConfig(requestConfig);
            // 执行请求
            response = httpClient.execute(httpPost);
            entity = response.getEntity();
          //  responseContent = EntityUtils.toByteArray(entity);
             responseContent = EntityUtils.toString(entity, "UTF-8");  //如果需要返回字符串改这里就行了
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                // 关闭连接,释放资源
                if (response != null) {
                    response.close();
                }
                if (httpClient != null) {
                    httpClient.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return responseContent;
    }

    public static String getUrl(Map<String, String> params) {
        if (params == null) {
            return null;
        }

        params.remove("sign");
        params.remove("sign_type");

        StringBuffer content = new StringBuffer();
        List<String> keys = new ArrayList<String>(params.keySet());
        Collections.sort(keys);

        for (int i = 0; i < keys.size(); i++) {
            String key = keys.get(i);
            String value = params.get(key);
            content.append((i == 0 ? "" : "&") + key + "=" + value);
        }

        return content.toString();
    }
}